\begin{tikzpicture}
    \pgfmathsetmacro{\R}{1.8}
    \pgfmathsetmacro{\r}{1.4}

    \tkzDefPoints{0/0/O_2}
    \tkzDefPoint(180:\R){O_1}
    \tkzDefPoint(0:\R){C}
    \tkzInterCC[R](O_1,\r)(O_2,\R)  \tkzGetPoints{A}{B}

    \tkzDrawCircle[thick](O_1,A)
    \tkzDrawCircle[thick](O_2,A)
    \tkzDrawPoints(O_1, O_2)
    \tkzDrawSegments(O_1,C  A,C)

    \tkzLabelPoints[left](O_1)
    \tkzLabelPoints[below](O_2)
    \tkzLabelPoints[above=.2em](A)
    \tkzLabelPoints[below=.2em](B)
    \tkzLabelPoints[right](C)
\end{tikzpicture}

